We're dividing 87038933 by 143 
The aim is to understand the frequency of 143 in 87038933.

On to step 1:
If we divide 8 by 143, we get 0 and a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Append the next digit (7) from the dividend to 8 and continue with: 87 / 143

Going ahead to step 2:
87 divided by 143 is 0 with a remainder of 87.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 87 to get 87.
Fetch the next digit (0) from the dividend, attach it to 87 and continue: 870 / 143

Step 3:
870 divided by 143 is 6 with a remainder of 12.
Put 6 as the next digit of the answer. 
Result so far: 6.0
Subtract 858 from 870 to get 12.
Fetch the next digit (3) from the dividend, attach it to 12 and continue: 123 / 143

Going ahead to step 4:
When dividing 123 by 143, we get 0 with a remainder of 123.
Record the quotient 0 as the next digit in the result. 
Result so far: 60.0
The remainder is 123 after subtracting 0 from 123.
Grab the next digit (8) from the dividend, add it to 123, then carry on: 1238 / 143

Advancing to step 5:
When dividing 1238 by 143, we get 8 with a remainder of 94.
The number 8 becomes the next digit in our result. 
Result so far: 608.0
Subtract 1144 from 1238 to get 94.
Bring next digit (9) of the dividend behind the 94 and repeat the process: 949 / 143

Step 6:
If we divide 949 by 143, we get 6 and a remainder of 91.
The number 6 becomes the next digit in our result. 
Result so far: 6086.0
The remainder is 91 after subtracting 858 from 949.
Fetch the next digit (3) from the dividend, attach it to 91 and continue: 913 / 143

Step 7:
143 goes into 913 6 times with a remainder of 55.
Use 6 as the next digit of our solution. 
Result so far: 60866.0
If we subtract 858 from 913, we get 55.
Take the next digit (3) from the dividend and append it to 55, then repeat: 553 / 143

Step 8:
When dividing 553 by 143, we get 3 with a remainder of 124.
Use 3 as the next digit of our solution. 
Result so far: 608663.0
Subtracting 429 from 553 leaves us with 124.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1240, and continue the process.

Advancing to step 9:
1240 divided by 143 is 8 with a remainder of 96.
Write down 8 as next digit of the result. 
Result so far: 608663.8
Subtracting 1144 from 1240 leaves us with 96.
Since there are no more digits in the dividend, we add a zero to the remainder making it 960, and continue the process.

Advancing to step 10:
143 can be fit into 960 6 times, resulting in a remainder of 102.
The next digit of our result is 6. 
Result so far: 608663.86
If we take 858 away from 960, we end up with 102.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1020, and continue the process.

Step 11:
The number 143 fits into 1020 7 times, leaving a remainder of 19.
Record the quotient 7 as the next digit in the result. 
Result so far: 608663.867
Subtract 1001 from 1020 to get 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Step 12:
143 can be fit into 190 1 times, resulting in a remainder of 47.
The next digit of our result is 1. 
Result so far: 608663.8671
The remainder is 47 after subtracting 143 from 190.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

On to step 13:
The number 143 fits into 470 3 times, leaving a remainder of 41.
The next digit of our result is 3. 
Result so far: 608663.86713
Subtract 429 from 470 to get 41.
Since there are no more digits in the dividend, we add a zero to the remainder making it 410, and continue the process.

Going ahead to step 14:
If we divide 410 by 143, we get 2 and a remainder of 124.
Write down 2 as next digit of the result. 
Result so far: 608663.867132
Subtract 286 from 410 to get 124.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1240, and continue the process.

Going ahead to step 15:
The number 143 fits into 1240 8 times, leaving a remainder of 96.
Use 8 as the next digit of our solution. 
Result so far: 608663.8671328
Deduct 1144 from 1240 and we're left with 96.
Since there are no more digits in the dividend, we add a zero to the remainder making it 960, and continue the process.

Advancing to step 16:
When dividing 960 by 143, we get 6 with a remainder of 102.
The next digit of our result is 6. 
Result so far: 608663.86713286
The remainder is 102 after subtracting 858 from 960.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1020, and continue the process.

The quotient of the division is 608663.86713286, and the remainder is 1.02e-07.